TE Connectivity 643820-7 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 643820-7 is a 7-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 24 AWG discrete or ribbon cable. This connector features tin-lead contact finish, a polarizing key, and closed-end design for secure mating. The part is currently active in production with 842 pieces in stock.

Substitute parts are identified to address specific application requirements, including RoHS compliance status, contact finish specifications, and packaging configurations. Alternative part numbers within the same series maintain electrical and mechanical compatibility while offering different material certifications and availability options.

Substiute Parts

643820-7

TE Connectivity AMP ConnectorsIn Stock: 932643820-7 Datasheet

Current PartRFQ

3-643820-7

TE Connectivity AMP ConnectorsIn Stock: 28193-643820-7 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 643820-7 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Number of positions: 7
• Pitch: 0.156" (3.96mm)
• Connector type: Rectangular receptacle
• Contact type: Female socket
• Cable termination: IDC
• Wire gauge: 24 AWG
• Wire type: Discrete or ribbon cable
• Mounting type: Free hanging (in-line)
• Fastening type: Locking ramp
• Features: Closed end, polarizing key
• Contact finish thickness: 80.0µin (2.03µm)
• Moisture sensitivity level: 1 (unlimited)

Variable Parameters (Allowed to Differ):

• Contact finish material (tin-lead vs. tin)
• RoHS compliance status
• Packaging configuration
• Inventory availability

The substitute part 3-643820-7 maintains full electrical and mechanical compatibility with the main part while offering alternative contact finish and improved RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

643820-7 (Tin-Lead Contact Finish): Select this part number for applications where tin-lead contact finish is explicitly required by design specification. This part is RoHS non-compliant and suitable for legacy systems or applications with specific material requirements. Current inventory availability is 842 pieces.

3-643820-7 (Tin Contact Finish): Select this part number for new designs and applications requiring RoHS3 compliance. The tin contact finish meets modern environmental and regulatory standards while maintaining identical electrical and mechanical performance. This substitute offers significantly higher inventory availability at 2717 pieces and is the preferred selection for applications without legacy material constraints.

Both parts are manufactured by TE Connectivity within the MTA-156 series and maintain full compatibility across all critical electrical and mechanical parameters. Selection between these alternatives is determined by RoHS compliance requirements and contact finish material specifications rather than functional performance differences.

Frequently Asked Questions (FAQ)

Q: Are the 643820-7 and 3-643820-7 connectors electrically interchangeable?

A: Yes. Both connectors maintain identical electrical specifications including 7-position configuration, 0.156" pitch, 24 AWG wire gauge capacity, and IDC termination method. The difference in contact finish material (tin-lead vs. tin) does not affect electrical performance or mating compatibility.

Q: What is the primary difference between these two part numbers?

A: The primary difference is the contact finish material and RoHS compliance status. The 643820-7 features tin-lead contact finish and is RoHS non-compliant. The 3-643820-7 features tin contact finish and is ROHS3 compliant. Both maintain the same contact finish thickness of 80.0µin (2.03µm).

Q: Can I use the 3-643820-7 as a direct replacement for the 643820-7 in existing designs?

A: Yes, the 3-643820-7 is mechanically and electrically compatible with the 643820-7. However, if your design specification explicitly requires tin-lead contact finish, the 643820-7 must be used. For new designs without such constraints, the 3-643820-7 is the recommended selection due to RoHS3 compliance.

Q: What does the packaging difference mean?

A: The 643820-7 packaging is not specified in the documentation. The 3-643820-7 is supplied in bulk packaging. Bulk packaging typically indicates higher volume availability and is suitable for production environments. Contact the supplier for specific packaging details of the 643820-7 if required.

Q: Are both parts suitable for ribbon cable and discrete wire applications?

A: Yes. Both connectors support discrete or ribbon cable termination via IDC (Insulation Displacement Contact) method at 24 AWG wire gauge.

Q: What is the moisture sensitivity level for these connectors?

A: Both connectors have a Moisture Sensitivity Level (MSL) of 1, which indicates unlimited shelf life without moisture control requirements.

Q: Do these connectors require any special handling or storage conditions?

A: No. With MSL rating of 1 (unlimited), these connectors do not require special moisture control, desiccant storage, or baking procedures prior to assembly.